diff --git a/MoreLinq.Test/FoldTest.cs b/MoreLinq.Test/FoldTest.cs
index 90906849c..7824b6873 100644
--- a/MoreLinq.Test/FoldTest.cs
+++ b/MoreLinq.Test/FoldTest.cs
@@ -27,21 +27,21 @@ public class FoldTest
         public void FoldWithTooFewItems()
         {
             Assert.Throws<InvalidOperationException>(() =>
-                Enumerable.Range(1, 3).Fold((a, b, c, d) => a + b + c + d));
+                Enumerable.Range(1, 3).Fold(BreakingFunc.Of<int, int, int, int, int>()));
         }
 
         [Test]
         public void FoldWithEmptySequence()
         {
             Assert.Throws<InvalidOperationException>(() =>
-                Enumerable.Empty<int>().Fold(a => a));
+                Enumerable.Empty<int>().Fold(BreakingFunc.Of<int, int>()));
         }
 
         [Test]
         public void FoldWithTooManyItems()
         {
             Assert.Throws<InvalidOperationException>(() =>
-                Enumerable.Range(1, 3).Fold((a, b) => a + b));
+                Enumerable.Range(1, 3).Fold(BreakingFunc.Of<int, int, int>()));
         }
 
         [Test]